<http://schema.org/image_url>
"http://media.nola.com/politics/photo/new-orleans-city-halljpg-b2ec3a7e1e45fc9c.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2011/12/stacy_head_eugene_green_qualif.html>